TH-A5R
1-30
3. Truth table
3. Truth table
1. Pin layout
2. Pin function
1
2
3
4
5
6
7
8
9
10
OE1
I0
O4
I1
O5
I2
O6
I3
O7
GND
20
19
18
17
16
15
14
13
12
11
Vcc
OE2
O0
I4
O1
I5
O2
I6
O3
I7
74VHCT244A (DIC12) : Buffer/Line driver
Symbol
OE1,OE2
I0-I7
O0-O7
Outputs
(Pins12,14,16,18)
In
L
H
X
OE1
L
L
H
L
H
Z
H:HIGH Voltage Level
L:LOW Voltage Level
I:Immaterial
Z:High Impedance
Outputs
(Pins3,5,7,9)
In
L
H
X
OE2
L
L
H
L
H
Z
Function
3-STATE Output Enable Inputs
Inputs
3-STATE Outputs
Inputs
Inputs
1. Pin layout
2. Pin function
74LVT573 (U10, U11, U12) : Latch
OE
D0
D1
D2
D3
D4
D5
D6
D7
GND
Vcc
O0
O1
O2
O3
O4
O5
O6
O7
LE
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
Symbol
D0-D7
LE
OE
O0-O7
Function
Data Inputs
Latch Enable Input
Output Enable Input
3-STATE Latch Outputs
Inputs
Outputs
LE
X
H
H
L
OE
H
L
L
L
Dn
X
L
H
X
On
Z
L
H
O0
H:HIGH Voltage Level
L:LOW Voltage Level
Z:High Impedance
X:Immaterial
O0:Previous O0 before HIGH to LOW transition of Latch Enable
MM74HCT245 (U15) : Transceiver
20 19 18 17 16 15 14 13 12 11
1 2 3 4 5 6 7 8 9 10
Vcc G B1 B2 B3 B4 B5 B6 B7 B8
DIR A1 A2 A3 A4 A5 A6 A7 A8 GND
ENABLE
Control
Inputs
Operation
G
L
L
H
DIR
L
H
X
245
B data to A bus
A data to B bus
isolation
H=HIGH Level
L=LOW Level
X=Irrelevant
2. Truth table
1. Pin layout
Содержание TH-A5R
Страница 35: ...TH A5R 1 35 M E M O ...
Страница 45: ...A B C D E F G 1 2 3 4 5 2 9 TH A5R Front board Switch board Display board Printed circuit boards ...
Страница 46: ...H A B C D E F G 1 2 3 4 5 2 10 TH A5R TH A5R Main board Forward side ...
Страница 47: ...A B C D E F G 1 2 3 4 5 2 11 TH A5R Main board Reverse side ...
Страница 51: ...TH A5R 2 15 1 2 3 4 5 A B C D Jack board ...
Страница 53: ...TH A5R 3 2 M E M O ...
Страница 77: ...TH A5R 3 26 M E M O ...